Red colour alarms: if you have problem with health , you should stay at home. If you feel bad, you can go to doctor. Leave car at home and use public transport or bike.

Index is counted every hour for following substances: nitrogen dioxide, sulphur dioxide, particulate matter (PM10) and benzene. For every substance index is nominated on base below table. Then we choose the worst index in every hour , moreover we qualify dominant substance which is the worst index in given hour.read more...